复杂地层高压旋喷护壁堵漏技术的研究与应用

借鉴复杂地层高压旋喷护壁堵漏技术设计了一种带有特殊喷嘴的旋喷钻具,在复杂地层钻进,尤其是多层段复杂地层和深部复杂地层钻进时,泥浆护壁失效的情况下,将该钻具下到复杂孔段,利用泥浆泵将水泥浆液压入,通过旋喷钻具连续旋转喷射出高压水泥浆切割坍（垮）塌孔段孔壁,使不稳定孔壁的破碎岩土崩落掉块与水泥浆混合,候凝后,在坍（垮）塌孔段形成直径不规则的柱状水泥岩土混合体,重新钻穿后,形成有一定强度的“水泥套管”,从而达到同径护壁堵漏的目的。详细介绍了该项技术的旋喷钻具的设计、水泥浆液配方、工艺原理、技术要点、操作要领及生产应用效果。     

高压旋喷加灌注桩在卵砾石地层基坑支护工程中的应用

结合宜昌当阳东城明珠小区基坑支护工程实践,叙述了高压旋喷加灌注桩技术,在卵砾石地层基坑支护工程中形成防渗帷幕的应用,阐明了高压旋喷桩的加固成桩机理、工艺流程、技术参数、主要工序的施工质量控制方法、效果分析以及高压旋喷桩的优点和应用前景等。     

高压旋喷技术在土石坝防渗墙中的应用

高压旋喷技术在地基加固和防渗止水方面有较强的适应性,均有广泛应用。在某水电站工程土石坝土质坝基防渗措施中,根据工程实际情况,进行技术经济比选处理方案,拟采用高压旋喷搭接成防渗墙的方式进行防渗。通过在坝基土层中进行不同喷射参数的旋喷试验,确定坝基地层采用高压旋喷防渗技术的可行性,并比较选择各项旋喷参数。     

高压旋喷桩的单管分喷施工法

高压旋喷桩的单管分喷施工法钟志钧（冶金部长沙冶金设计研究院勘察分院）１概述高压喷射注浆技术广泛用于地基加固、防渗堵水、边坡稳定等工程。传统的高压旋喷注浆技术，依其工艺流程及输送介质的管道不同，分为单管、双重管、三重管三种方法。采用上述方法输送水泥浆，...     

污染场地修复药剂对高压旋喷装置的腐蚀及注入工艺的试验研究

采用传统的注入井注射药剂进行土壤修复时,修复效果差且治理周期长.本文采用高压旋喷注浆技术来弥补传统药剂注入方式的不足.进行室内浸泡试验,研究对比传统修复药剂对高压旋喷设备的腐蚀性;同时采用水泥浆液作为“药剂”进行高压旋喷的现场模拟试验,得到了适用于上海粘性地层中的土壤原位修复高压旋喷工艺参数,完善了适用于污染场地原位修复的旋喷工艺.     

三重管高压旋喷桩施工技术

通过上海船厂船台门墩旋喷桩加固工程施工，全面介绍了三重管高压旋喷桩加固机理、适用地层、选用设备、喷射机具、施工工艺以及施工问题与技术对策。     

深孔复杂地层钻进技术支撑新能源地质调查

正新能源(页岩气、地热、油气、铀矿等)地质调查钻井大都在新区新层系新领域新构造中进行,地层条件、地质构造十分复杂,经常出现严重井漏、井斜、井壁垮塌、坚硬打滑、孔内事故频发等多种情况,致使新能源地质调查井钻井施工困难,花费了大量人力、物力。为解决页岩气等新能源地质调查钻井中的小口径深孔复杂地层钻进技术难题,中国地质调查局北京探矿工艺研究所开展了小直径随钻定向纠斜、"三步曲"快速堵漏、深孔高压旋喷护壁、复杂地层取心     

河流冲积层软地基处理方法

高压旋喷桩是以高压旋转的喷嘴将水泥浆喷入土层与土体混合,形成水泥加固体,与桩间土形成复合地基,共同承担上部结构荷载。具有施工占地少、振动小、效率高等特点,是目前广泛推广的地基处理方法。结合工程实例探讨高压旋喷桩在河流冲积层软地基处理中的应用。     

高喷技术在长江垂直防渗墙复杂地层中的应用探讨

结合长江罗家潭堤段高压防渗墙工程的施工情况，对复杂地层的防渗墙施工进行了分析，并结合高喷技术的固结防渗机理提出了高压旋喷方法在复杂地层中应用时应注意的几个问题。     

旋喷水泥护壁在湖北放马山矿区ZK10409孔的应用

结合湖北放马山矿区ZK10409孔钻进实例,分析了岩心钻探旋喷水泥护壁原理及特点,介绍了旋喷水泥灌注机具及其在岩心钻探中的具体操作方法,阐述了岩心钻探旋喷护壁水泥的效果。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。